Use the Measure tool to measure the distance between any two points in your 2D plan.
To use the Measure tool:
Select Tools > Measure.
Click your first point on the screen.
Move your cursor in the direction you want to measure. A ruler is displayed that stretches as you move your cursor.
Click your second point on the screen. The distance is shown on the ruler as well as on the Status bar at the bottom of the screen.
Once you have measured your first distance, you can keep selecting points to measure additional distances from the last point selected. A running total is displayed on the Status bar.
When you have finished measuring, right-click and select Finish.